OP
@wbdvt avatar
UTC

Molto Verboso
'16 Sprint S 150, 2 x '06 GTS 250, '12 GTS 300, '74 Vespa 150 Super
Joined: UTC
Posts: 1512
Location: Vermont
 
Molto Verboso
@wbdvt avatar
'16 Sprint S 150, 2 x '06 GTS 250, '12 GTS 300, '74 Vespa 150 Super
Joined: UTC
Posts: 1512
Location: Vermont
UTC quote
I am looking at replacing the speedometer due to the LCD screen faded and very hard to see.

I am looking at a SIP aftermarket one as it is less expensive than OEM replacement and has some nice features. One feature that I do like is that coolant temp can be displayed in degrees C and not just a line of bars.

Why is that nice to me? Apparently the coolant fan circuit is not working properly and will come on and off when not needed and sometimes runs continuously. The sensor, tstat, coolant has all been changed and per a dealer, when looking at it thru PADS, temp is jumping around so looks like ECU is the issue, but not an inexpensive repair. So my thought is to put an on/off switch in fan circuit and manually turn on when at 80 deg C. Note that this scooter is in Vermont and my other scooters the fan has only come on once when hot day waiting at light, so don't think it is a huge concern.

So, what is anyone's experience with this speedometer replacement?
@old_as_dirt avatar
UTC

Veni, Vidi, Posti
2007 GTS
Joined: UTC
Posts: 22534
Location: Harriman, Tennessee, Tn
 
Veni, Vidi, Posti
@old_as_dirt avatar
2007 GTS
Joined: UTC
Posts: 22534
Location: Harriman, Tennessee, Tn
UTC quote
gopam and got mojo did one on her GT 200. might reach out to either of them.

Also I am interested in this project your going to tackle for my 07 as well.

So please do a step by step pic thread.
@berto avatar
UTC

Molto Verboso
2006 LX150 (carbed) | 2007 GT200
Joined: UTC
Posts: 1928
Location: Toronto
 
Molto Verboso
@berto avatar
2006 LX150 (carbed) | 2007 GT200
Joined: UTC
Posts: 1928
Location: Toronto
UTC quote
wbdvt wrote:
I am looking at replacing the speedometer due to the LCD screen faded and very hard to see.
Understood you may want to replace the speedometer regardless. But just in case, it is possible to renew the LCD screen: Gts250 burnt LCD polarizer replacement
@chachi13 avatar
UTC

Member
2022 Primavera 150
Joined: UTC
Posts: 44
 
Member
@chachi13 avatar
2022 Primavera 150
Joined: UTC
Posts: 44
UTC quote
wbdvt wrote:
temp is jumping around so looks like ECU is the issue, but not an inexpensive repair. So my thought is to put an on/off switch in fan circuit and manually turn on when at 80 deg C
How will you know the temp is at 80c if you don't replace the ECU?
OP
@wbdvt avatar
UTC

Molto Verboso
'16 Sprint S 150, 2 x '06 GTS 250, '12 GTS 300, '74 Vespa 150 Super
Joined: UTC
Posts: 1512
Location: Vermont
 
Molto Verboso
@wbdvt avatar
'16 Sprint S 150, 2 x '06 GTS 250, '12 GTS 300, '74 Vespa 150 Super
Joined: UTC
Posts: 1512
Location: Vermont
UTC quote
Chachi13 wrote:
How will you know the temp is at 80c if you don't replace the ECU?
Good question as originally I thought that the coolant temp was displayed in degrees C based on description but reading the manual it looks like coolant temp is displayed in bars (5-6) but an alarm can be set based on number of bars (5-6). So I can play around with when the fan comes on and set an alarm at that point. Then can manually turn on fan.

There is an optional temperature sensor that mounts at the spark plug that can be bought. That output is in digital degrees C
@crazycarl avatar
UTC

Ossessionato
2007 250 GTS, 1980 P200E, 2010 ThunderFly 190 (SOLD) 2015 Yamaha SMax (SOLD)
Joined: UTC
Posts: 3404
Location: Springboro, OH
 
Ossessionato
@crazycarl avatar
2007 250 GTS, 1980 P200E, 2010 ThunderFly 190 (SOLD) 2015 Yamaha SMax (SOLD)
Joined: UTC
Posts: 3404
Location: Springboro, OH
UTC quote
Replacing the polarizer film is going to be a lot cheaper and less headache.

But the SIP unit is really very nice, so at least you have an option.
OP
@wbdvt avatar
UTC

Molto Verboso
'16 Sprint S 150, 2 x '06 GTS 250, '12 GTS 300, '74 Vespa 150 Super
Joined: UTC
Posts: 1512
Location: Vermont
 
Molto Verboso
@wbdvt avatar
'16 Sprint S 150, 2 x '06 GTS 250, '12 GTS 300, '74 Vespa 150 Super
Joined: UTC
Posts: 1512
Location: Vermont
UTC quote
CrazyCarl wrote:
Replacing the polarizer film is going to be a lot cheaper and less headache.

But the SIP unit is really very nice, so at least you have an option.
Not my scooter plus I like the option to set an alarm where I want it for the cooling fan issue.

Doesn't look like much work to replace
@motovista avatar
UTC

Veni, Vidi, Posti
GT 2.4
Joined: UTC
Posts: 9026
Location: Watts, Cherokee Nation
 
Veni, Vidi, Posti
@motovista avatar
GT 2.4
Joined: UTC
Posts: 9026
Location: Watts, Cherokee Nation
UTC quote
The "SIP" speedometer is made by KOSO, and you can find them on sites like Aliexpress for about $90-150, depending on the vendor. The one for the Primavera/Sprint is very easy to find, but the GTS one is out there too. Just make sure the shape is the same, and it will fit. One of them was on Temu for a while and it was really cheap. I think it was something like $27.
If the listing says you have to buy 90 or so to get a decent price, you can usually get them to send you a sample pretty close to that price.
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